[Titanscape (OP)]

http://www.bigvolcano.com.au/natural/wollum.htm

This is a beautiful place in NSW/Qld. Wallabies, rivers, birds, frogs, lizards... pristine.

Titanscape

[JimBob]

We Texans know how to brag as well - Yellostone Crater in Wyoming is a much larger crater - 85x45 km.

Here is what Google Earth has to say:

The Yellowstone Plateau volcanic field developed through three volcanic cycles spanning two million years that included some of the world's largest known eruptions. Eruption of the >2450 cu km Huckleberry Ridge Tuff about 2.1 million years ago created the more than 75-km-long Island Park caldera. The second cycle concluded with the eruption of the Mesa Falls Tuff around 1.3 million years ago, forming the 16-km-wide Henrys Fork caldera at the western end of the first caldera. Activity subsequently shifted to the present Yellowstone Plateau and culminated 640,000 years ago with the eruption of the >1000 cu km Lava Creek Tuff and the formation of the present 45 x 85 km caldera. Resurgent doming subsequently occurred at both the NE and SW sides of the caldera and voluminous (1000 cu km) intracaldera rhyolitic lava flows were erupted between 150,000 and 70,000 years ago. No magmatic eruptions have occurred since the late Pleistocene, but large phreatic eruptions took place near Yellowstone Lake during the Holocene. Yellowstone is presently the site of one of the world's largest hydrothermal systems including Earth's largest concentration of geysers.

Sorry, mate! []


The mind is like a parachute. It works best when open.  -- A. Einstein

[Bass]

In terms of eruptive volume, La Garita, at 5000+ cubic km, is the largest- erupting during the Oligicene (around 26 million years ago)- located in the San Juan Mountains of Colorado

Subduction causes orogeny.